23253749 has 4 divisors (see below), whose sum is σ = 23635020. Its totient is φ = 22872480.

The previous prime is 23253731. The next prime is 23253761. The reversal of 23253749 is 94735232.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 280900 + 22972849 = 530^2 + 4793^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23253749 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23253719) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 190544 + ... + 190665.

It is an arithmetic number, because the mean of its divisors is an integer number (5908755).

Almost surely, 2^23253749 is an apocalyptic number.

It is an amenable number.

23253749 is a deficient number, since it is larger than the sum of its proper divisors (381271).

23253749 is an equidigital number, since it uses as much as digits as its factorization.

23253749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 381270.

The product of its digits is 45360, while the sum is 35.

The square root of 23253749 is about 4822.2141180167. The cubic root of 23253749 is about 285.4287135579.

The spelling of 23253749 in words is "twenty-three million, two hundred fifty-three thousand, seven hundred forty-nine".